public IntegerPair AbsOffsetTo(IntegerPair other)
 {
     return(new IntegerPair(Math.Abs(this.RA - other.RA), Math.Abs(this.Dec - other.Dec)));
 }
 public bool Equals(IntegerPair obj, double toleranceRadians)
 {
     return((Math.Abs(obj.RA - this.RA) < toleranceRadians) &&
            (Math.Abs(obj.Dec - this.Dec) < toleranceRadians));
 }